Quick-change pump-jack head



March 19, 1929. A. w. R, SCHUL-rz QUICK CHANGE PUMP JACK HEAD Filed May26, 1925 2 Sheets-Sheet zz. 23 (L j@ fir/1... l ...bf/f? INVENTOR jfzgielberf n/Hkfckulliz:

AITORNEY i March 19, 1929. A. w. R. scHuLTz QUICK CHANGE PUMP JACK HEADFiled May 26, 1925 2 Sheets-Sheet 2 Parenteel Mar. 19, 1929.

iiirsn STATES PATET oFFicE.

ADELBERT W. n. sen-Uma, or crearon, IOWA.

QUICK-CHANGE PUMP-JACK HEAD. I

Application filed May 26, 1925. Serial No. 32,944.

rl-his invention relates to pump jack heads A wind and 'other powerarrangement naturally j necessitates the disconnecting or the pump rodorsucker rod ,trein one power device and the connecting of the same to theother. It frequently happens that such changes have to be made one ormore tim-es every day and, Where ordinary bolts and like connections areused the operation requires a considerable time and the use of Wrenchesor other tools.

rihe important objects of the present invention are to provide a noveland improved device for connecting the sucker rod orn anV ordinary Wellpump to the pitman or connecting rod .of an ordinary power drive,capable itself of being driven by a motor such as a gasoline engine orelectric motor, .the connecting nieans being such that it may be`quickly operated by hand and Without the use of tools, the connectingalso being or' such character that it cannot become accidentlydisconnected during the operation ot the pump. f f

QV ith 'these and other cbjects in view as Wili be hereinafter apparent,the invention consists ot certain novel features of lconstruction andcombination of parts, one preferred 'torni of which will be nowdescribcdin detail and then specifically claimed7 reference being had to theaccompanying drawings, wherein:

Figure 1 is a side elevation oi a pump showing thesaine located at thelower part offa Windmill and illustrating the improved pitmanarrangement.v y f Figure 2 is a section on the line 2-2 of the Figure 1.

Figure 3 is an enlarged detail side elevationof the upper part of thepitman and the v:sucker rod .and showing ythe improvedV conf nectionthereotthesame -being illustrated as closed in full lines and as openedin broken lines. y Y

Figure 4 is a front View of the parts shown in Figure 8.

:pump handle 12,

`ends of the rods 25. There are a ser Figure 5 is a plan View of saidparts.v

Figure 6 isa section on the line 6-6 in Figure 4.

Figure '.7 is Figure 5.

'Figure 8 .is Figure 4.

Figure 9 is a detail perspective view of a swinging lock member usedherewith.

The invention has here been shoivnas apa sectionon the line 7-7 of`plied to an ordinary iron body pump illus-` trated in generalA at 10.This pump is equipped With the usual pump rod or sucker rod 11 and maybe operated by ordinary described. ln order to provide for the motordrive of the pump there is provided, on the Wellhead or casing .13, a

iframe 14 which is secured to the Well head by bolts 15 and to the pumpbarrel by bolts 16.

Journaled in this irame is a shaft 17 Whereon is mounted a belt pulley18 adapted iii-or the reception of an ordinary belt 19 of any suitablekind and leading Jfrom a motor7 the latter not being' deemed necessaryhere to be shown. On this shaft 17 is fixed a pinion 20,

which meshes .with a gear 21 i'ixed on a shait.

22 also journaled vin the frame v14. On each end of the shaft is a crankdisk 23 provided with a crank pin 24. The pitman is oi built upconstruction, consisting of a pair of rods 25 having their lower endsmounted yon the pins Q4 and their upper ends connected by a cross bar orcross casting 26, this casting'being Vconnected to the rodsQ by means ofbolts 27 j iassing through bolt holes in the upper j i these bolt holesin these rods so 'that the isti ng may be connected at a selectedjmsition t-o said rods.` Extending,.forwardly from the front tace of thecasting 2e is a lugl 2S) wherethrough passes abolt having a cylindricalheadV 30 and having a` reduced and threaded shank 31,1the headengagingone side of the lug 2) and the shank -passingthrough anopeningin said lug and having a nut 32 screwed thereon. Thus the head 30 formsa crank pin. Alined vertically above the lug 29 and projecting upwardlyron the top of the casing 26 is an ear 33, a similar ear 34 alsoprojecting upwardly in spaced relation tothe ear 33 so thit a pivot pin35 may be'supportedby these ears, being a section ontheline 8 8 or'which bears against the tace of the casting' 3G When the locking` plateis swung down into locking` position shown in full lines in Fign ure 6.rlhe locking' plate conforms in general to the shape ol the lug` 29 andWhen in a locking position, lies parallel thereto and close to the endot the bolt head 80. This locking;` plate is provided with anoperating;` handle 40. The pump or sucker rod ll provided with anopeningv l1 Which lits on the head 30. rllhus, when the lockingl plateis svvui'ig upwardly, bolt head 30 may be slipped out oil the openingll, thus disconnecting the sucker red from the power di'iven pitman. lnorder to retain the plate 38 in its locking; position the hub 3.7 ismade somewhat shorter than the rods between the ears 33 and 34- and atone end is provided with a notch l2 adapted tor engagement with. at-ooth et?) termed on a spring Washer fist. The lockingr plate, it willbe noted, when in unlocking Tiosition is entirely clear ot the suckerrod as can be seen in the dotted line positions shown in Figures 8 andt. It will be noted that the ytasting 2G forms a head for the pitman.

lit Will be obvious that it is merely necessary, in 'the operation otthe device to move the locking plate to the open position, adjust thesucker rod on the head 30 or slip the head out ot the opening ll asrequired and then sivin the locking` plate to its locking position.

l/Vhile one preferred embodiment of the invention has here been shown itwill be obvious to engineers and others skilled in this art that changesmay be inadefin the detail and proportions of the device Withoutdeparting` from the principles. Accordingly it is to be understood that`the invention is to be interpreted in accordance with the breadth ot theclaims and not by the exact detail ot construction herein shoivn anddescribed.

lilaving thus described the invention, what is claimeffi as new, is:

l. A pitman and pump rod connection coinprisiun' a pituian having' ahead provided With a projecting pin, a pump rod havinp'iin opening;receiving' said pin, a pivot pin carried by said head and parallel with'the tirst pin, and a loci-:ing plate swingably mounted on said pivotpin and movable into engagement with the pump i'od in a locking`position to prevent removal ot said rod from said projecting' pin.

2. A pitnian and pump rod connection coinprising' a pitinan headprovided with a pivot pin, a lug projecting from said hea-d, a pinprojecting laterally trom said lug', a pump rod havingI an openingreceiving .said pin, and a locking` plate svvingably mounted on saidpivot pin and movable into engagement With the pump rod in a lockingposition to prevent removal ot said rod 'from said projecting pin. p,

3. A'pitman and pump rod connection comprising a pitman head, a lugprojecting` lat right angles to said head, a pin projecting at rightangles to said lug, a pair of ears projecting at right angles to saidhead above said lug, a pivot shaft supported in said ears parallel tosaid pin, a sleeve rotatably mounted on said pivot shaft, a lockingplate projecting; 'from said sleeve parallel to said lug', said platebeing movable to cover and uncover the end oi" said pin, and anoperating handle oii said plate.

4t. A pitman and pump rod connection comprising a pitman having a headprovided with a pivot pin and a laterally7 projecting pin, a pump rodliaviiig an opening therein receivsaidlaterally projecting pin,a'loclriiig; plate sivingably mounted on said pivot pin and movable intogement with the pump rod in a locking 'po tion to prevent removal ofsaid rod trom said projecting pin, and spring' means to hold the lockingplate releasably in locking position.

5. A pitinan an d pump rod connection coinprising a pitman havin g ahead provided With a projecting ain, a pump rod having an openingreceiving' said pin, a pivot pin carried by said head and paralleln'iththe tirst pin, a locking` plate swingably iiiounted on said pivot pinand movable into engagement With the pump rod in a locking position toprevent removal ot said rod troni said projecting pin, and spring meansto hold the locking' plate releasahly iii locking position. Y

G. A pitnian and pump rod connection comf prising a pitinan headprovided With a pivot pin, a lug projecting` trom said'head, a pinjiirojecting laterally troni said lug, a pump rod having an openingreceiving,` said pin, a locking plate swingably mounted on said pivotpin and movable into engagement with the pump rod in a locking positionto prevent removal of said rod troni said projecting' pin, and spring'ii'leans to hold the locking' plate releasably .in locking position.

57. il pitman ano pump rod connection compre a pitinan. head, a lugprojecting' at right angles 'to-said he; d, a pin projecting' at rightangles to said lug, a pair of ears pro jeeting` at ri eht angles to saidhead above said lug', a pivot shatt supported in said ears parallel tosaid pin, a sleeve rotatably mounted on said pivot shaft, a locking'plate .projecting from said sleeve parallel to said lug, said platebeing movable to cover and uncover the end oi said pin, an operatingYhandle on said plate, and spring means to hold the locking platereleasably .in covering posi- L i Lion.V

ln testimony whereof l atlix my signature.v

